P2P Question

Could someone explain either in this forum or via message how P2P works? I've never used it before and I hear it's the easiest way to receive money. I contacted my book and they said I submit the request and they then send an email alerting me that the money is ready.

My question is--- Is that really all the process is? I hit submit, they email saying it's ready to be collected, and i go into any check shop that offers the two P2P options? Do I give them any information on the sender?